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wbn_multisigs_pt2_spend-funds.py
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# MULTISIGS - PART TWO - SPENDING FROM A 2-of-3 MULTISIG ADDRESS
# This simple wallet works with bitcoind and will only work with 2-of-3 multisigs
# wobine code for world bitcoin network blackboard 101
# Educational Purposes only
# Python 2.7.6 and relies on bitcoind & bitcoinrpc & wobine's github connection file
# We had to change the bitcoinrpc 'connection.py' file to add multisig support
# you'll need to download our 'connection.py' file from Github & stuff it in your bitcoinrpc folder
from bitcoinrpc.util import *
from bitcoinrpc.exceptions import *
from bitcoinrpc.__init__ import *
from bitcoinrpc.config import *
from bitcoinrpc.proxy import *
from bitcoinrpc.data import *
from bitcoinrpc.connection import *
bitcoin = connect_to_local() #creates an object called 'bitcoin' that allows for bitcoind calls
# YOU NEED AT LEAST TWO OF THE PRIVATE KEYS FROM PART ONE linked to your MULTI-SIG ADDRESS
multisigprivkeyone = "L2M1uRgdwgCotoP8prWJYYwz2zwWgsMa9TJwqARG7nFxkpdvBSsm" #your key/brother one
multisigprivkeytwo = "L1M2ZgjoAtDVu9uemahiZBQPwFA5Tyj4GLd1ECkDryviFrGp6m7k" #wallet service/brother two
multisigprivkeythree = "L5PkVBzR4SdQimMsfHnRqRegJZDFJ22sGjSbfp3SsPSnVoB8vRFE" #safe deposit box/brother three
ChangeAddress = "35Z3xG92YkW5Xo4ngQw6w5b3Ce6MDw94A8" #!!! Makes Sure to set your own personal Change Address
SetTxFee = int(0.00005461*100000000) # Lets proper good etiquette & put something aside for our friends the miners
unspent = bitcoin.listunspent() # Query wallet.dat file for unspent funds to see if we have multisigs to spend from
print "Your Bitcoin-QT/d has",len(unspent),"unspent outputs"
for i in range(0, len(unspent)):
print
print "Output",i+1,"has",unspent[i]["amount"],"bitcoins, or",int(unspent[i]["amount"]*100000000),"satoshis"
print "The transaction id for output",i+1,"is"
print unspent[i]["txid"]
print "The ScriptPubKey is", unspent[i]["scriptPubKey"]
print "on Public Address =====>>",unspent[i]["address"]
print
totalcoin = int(bitcoin.getbalance()*100000000)
print "The total value of unspent satoshis is", totalcoin
print
WhichTrans = int(raw_input('Spend from which output? '))-1
if WhichTrans > len(unspent): #Basic idiot check. Clearly a real wallet would do more checks.
print "Sorry that's not a valid output"
else:
tempaddy = str(unspent[WhichTrans]["address"])
print
if int(tempaddy[0:1]) == 1:
print "The public address on that account starts with a '1' - its not multisig."
elif int(tempaddy[0:1]) == 3:
print "The public address on that account is",tempaddy
print "The address starts with the number '3' which makes it a multisig."
print
print "All multisig transactions need: txid, scriptPubKey and redeemScript"
print "Fortunately all of this is right there in the bitcoind 'listunspent' json from before"
print
print "The txid is:",unspent[WhichTrans]["txid"]
print "The ScriptPubKey is:", unspent[WhichTrans]["scriptPubKey"]
print
print "And only multisigs have redeemScripts."
print "The redeemScript is:",unspent[WhichTrans]["redeemScript"]
print
print "You have",int(unspent[WhichTrans]["amount"]*100000000),"satoshis in this output."
HowMuch = int(raw_input('How much do you want to spend? '))
if HowMuch > int(unspent[WhichTrans]["amount"]*100000000):
print "Sorry not enough funds in that account" # check to see if there are enough funds.
else:
print
SendAddress = str(raw_input('Send funds to which bitcoin address? ')) or "1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd" #default value Sean's Outpost
if SendAddress == "1M72Sfpbz1BPpXFHz9m3CdqATR44Jvaydd":
print "Nice! Your chose to send funds to Sean's Outpost in Pensacola Florida."
print
Leftover = int(unspent[WhichTrans]["amount"]*100000000)-HowMuch-SetTxFee
print "This send to",SendAddress,"will leave", Leftover,"Satoshis in your accounts."
print "A tx fee of",SetTxFee,"will be sent to the miners"
print
print "Creating the raw transaction for User One - Private Key One"
print
rawtransact = bitcoin.createrawtransaction ([{"txid":unspent[WhichTrans]["txid"],
"vout":unspent[WhichTrans]["vout"],
"scriptPubKey":unspent[WhichTrans]["scriptPubKey"],
"redeemScript":unspent[WhichTrans]["redeemScript"]}],{SendAddress:HowMuch/100000000.00,ChangeAddress:Leftover/100000000.00})
print "bitcoind decoderawtransaction", rawtransact
print
print
print "And now we'll sign the raw transaction -> The first user gets a 'False'"
print "This makes sense because in multisig, no single entity can sign alone"
print
print "For fun you can paste this FIRST signrawtransaction into bitcoind to verify multisig address"
print "%s%s%s%s%s%s%s%s%s%s%s%s%s" % ('bitcoind signrawtransaction \'',rawtransact,'\' \'[{"txid":"',unspent[WhichTrans]["txid"],'","vout":',
unspent[WhichTrans]["vout"],',"scriptPubKey":"',unspent[WhichTrans]["scriptPubKey"],'","redeemScript":"',
unspent[WhichTrans]["redeemScript"],'"}]\' \'["',multisigprivkeyone,'"]\'')
print
signedone = bitcoin.signrawtransaction (rawtransact,
[{"txid":unspent[WhichTrans]["txid"],
"vout":unspent[WhichTrans]["vout"],"scriptPubKey":unspent[WhichTrans]["scriptPubKey"],
"redeemScript":unspent[WhichTrans]["redeemScript"]}],
[multisigprivkeyone])
print signedone
print
print "In a real world situation, the 'hex' part of this thing above would be sent to the second"
print "user or the wallet provider. Notice, the private key is not there. It has been signed digitally"
print
print
print "For fun you can paste this SECOND signrawtransaction into bitcoind to verify multisig address"
print "%s%s%s%s%s%s%s%s%s%s%s%s%s" % ('bitcoind signrawtransaction \'',signedone["hex"],'\' \'[{"txid":"',unspent[WhichTrans]["txid"],'","vout":',
unspent[WhichTrans]["vout"],',"scriptPubKey":"',unspent[WhichTrans]["scriptPubKey"],'","redeemScript":"',
unspent[WhichTrans]["redeemScript"],'"}]\' \'["',multisigprivkeytwo,'"]\'')
print
doublesignedrawtransaction = bitcoin.signrawtransaction (signedone["hex"],
[{"txid":unspent[WhichTrans]["txid"],
"vout":unspent[WhichTrans]["vout"],"scriptPubKey":unspent[WhichTrans]["scriptPubKey"],
"redeemScript":unspent[WhichTrans]["redeemScript"]}],
[multisigprivkeytwo])
print doublesignedrawtransaction
print
print "You are now ready to send",HowMuch,"Satoshis to",SendAddress
print "And",Leftover,"Satoshis will be sent to the change account",ChangeAddress
print "Finally, a miner's fee of ",SetTxFee,"Satoshis will be sent to the miners"
print
ReallyNow = (raw_input('If you hit return now, you will be sending these funds from your multisig account '))
ReallyNow2 = (raw_input('No...REally...If you hit return now, you will be sending funds from your multisig account '))
print
print "SORRY. We won't do this. Don't want anyone to lose money playing with this code"
print "But if you really want to send it, just"
print "copy the HEX from the big block up above"
print "and put it in a 'bitcoind sendrawtransaction' request"